4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
8 * This library is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License as published
10 * by the Free Software Foundation; either version 2.1 of the License, or
11 * (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 * the GNU Lesser General Public License for more details.
23 #include <linux/in6.h>
24 #include <linux/slab.h>
25 #include <linux/workqueue.h>
26 #include "cifs_fs_sb.h"
29 * The sizes of various internal tables and strings
31 #define MAX_UID_INFO 16
32 #define MAX_SES_INFO 2
33 #define MAX_TCON_INFO 4
35 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
36 #define MAX_SERVER_SIZE 15
37 #define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
38 #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
39 termination then *2 for unicode versions */
40 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
42 #define CIFS_MIN_RCV_POOL 4
45 * MAX_REQ is the maximum number of requests that WE will send
46 * on one socket concurrently. It also matches the most common
47 * value of max multiplex returned by servers. We may
48 * eventually want to use the negotiated value (in case
49 * future servers can handle more) when we are more confident that
50 * we will not have problems oveloading the socket with pending
53 #define CIFS_MAX_REQ 50
55 #define RFC1001_NAME_LEN 15
56 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
58 /* currently length of NIP6_FMT */
59 #define SERVER_NAME_LENGTH 40
60 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
62 /* used to define string lengths for reversing unicode strings */
64 /* (max path length + 1 for null) * 2 for unicode */
69 #ifndef XATTR_DOS_ATTRIB
70 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
74 * CIFS vfs client Status information (based on what we know.)
77 /* associated with each tcp and smb session */
86 LANMAN = 0, /* Legacy LANMAN auth */
87 NTLM, /* Legacy NTLM012 auth with NTLM hash */
88 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
89 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
90 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
91 Kerberos, /* Kerberos via SPNEGO */
97 /* Netbios frames protocol not supported at this time */
103 char ntlm[CIFS_SESS_KEY_SIZE + 16];
104 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
107 struct ntlmv2_resp resp;
117 struct cifs_sid osid;
118 struct cifs_sid gsid;
119 struct cifs_ntace *ntaces;
120 struct cifs_ace *aces;
124 *****************************************************************
125 * Except the CIFS PDUs themselves all the
126 * globally interesting structs should go here
127 *****************************************************************
130 struct TCP_Server_Info {
131 struct list_head tcp_ses_list;
132 struct list_head smb_ses_list;
133 int srv_count; /* reference counter */
134 /* 15 character server name + 0x20 16th byte indicating type = srv */
135 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
136 char *hostname; /* hostname portion of UNC string */
137 struct socket *ssocket;
139 struct sockaddr_in sockAddr;
140 struct sockaddr_in6 sockAddr6;
142 struct sockaddr_storage srcaddr; /* locally bind to this IP */
143 wait_queue_head_t response_q;
144 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
145 struct list_head pending_mid_q;
146 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
147 unsigned short server_codepage; /* codepage for the server */
148 enum protocolEnum protocolType;
151 bool svlocal:1; /* local server or remote */
152 bool noblocksnd; /* use blocking sendmsg */
153 bool noautotune; /* do not autotune send buf sizes */
155 atomic_t inFlight; /* number of requests on the wire to server */
156 #ifdef CONFIG_CIFS_STATS2
157 atomic_t inSend; /* requests trying to send */
158 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
160 enum statusEnum tcpStatus; /* what we think the status is */
161 struct mutex srv_mutex;
162 struct task_struct *tsk;
163 char server_GUID[16];
165 enum securityEnum secType;
166 unsigned int maxReq; /* Clients should submit no more */
167 /* than maxReq distinct unanswered SMBs to the server when using */
168 /* multiplexed reads or writes */
169 unsigned int maxBuf; /* maxBuf specifies the maximum */
170 /* message size the server can send or receive for non-raw SMBs */
171 unsigned int max_rw; /* maxRw specifies the maximum */
172 /* message size the server can send or receive for */
173 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
174 unsigned int max_vcs; /* maximum number of smb sessions, at least
175 those that can be specified uniquely with
177 char sessid[4]; /* unique token id for this session */
178 /* (returned on Negotiate */
179 int capabilities; /* allow selective disabling of caps by smb sess */
180 int timeAdj; /* Adjust for difference in server time zone in sec */
181 __u16 CurrentMid; /* multiplex id - rotating counter */
182 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
183 /* 16th byte of RFC1001 workstation name is always null */
184 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
185 __u32 sequence_number; /* needed for CIFS PDU signature */
186 struct session_key session_key;
187 char ntlmv2_hash[16];
188 unsigned long lstrp; /* when we got last response from this server */
189 u16 dialect; /* dialect index that server chose */
190 /* extended security flavors that server supports */
191 bool sec_kerberos; /* supports plain Kerberos */
192 bool sec_mskerberos; /* supports legacy MS Kerberos */
193 bool sec_kerberosu2u; /* supports U2U Kerberos */
194 bool sec_ntlmssp; /* supports NTLMSSP */
195 #ifdef CONFIG_CIFS_FSCACHE
196 struct fscache_cookie *fscache; /* client index cache cookie */
201 * Session structure. One of these for each uid session with a particular host
204 struct list_head smb_ses_list;
205 struct list_head tcon_list;
206 struct mutex session_mutex;
207 struct TCP_Server_Info *server; /* pointer to server info */
208 int ses_count; /* reference counter */
209 enum statusEnum status;
210 unsigned overrideSecFlg; /* if non-zero override global sec flags */
211 __u16 ipc_tid; /* special tid for connection to IPC share */
214 char *serverOS; /* name of operating system underlying server */
215 char *serverNOS; /* name of network operating system of server */
216 char *serverDomain; /* security realm of server */
217 int Suid; /* remote smb uid */
218 uid_t linux_uid; /* overriding owner of files on the mount */
219 uid_t cred_uid; /* owner of credentials */
221 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
222 TCP names - will ipv6 and sctp addresses fit? */
223 char userName[MAX_USERNAME_SIZE + 1];
226 unsigned int tilen; /* length of the target info blob */
227 unsigned char *tiblob; /* target info blob in challenge response */
228 bool need_reconnect:1; /* connection reset, uid now invalid */
230 /* no more than one of the following three session flags may be set */
231 #define CIFS_SES_NT4 1
232 #define CIFS_SES_OS2 2
233 #define CIFS_SES_W9X 4
234 /* following flag is set for old servers such as OS2 (and Win95?)
235 which do not negotiate NTLM or POSIX dialects, but instead
236 negotiate one of the older LANMAN dialects */
237 #define CIFS_SES_LANMAN 8
239 * there is one of these for each connection to a resource on a particular
242 struct cifsTconInfo {
243 struct list_head tcon_list;
245 struct list_head openFileList;
246 struct cifsSesInfo *ses; /* pointer to session associated with */
247 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
248 char *nativeFileSystem;
249 char *password; /* for share-level security */
250 __u16 tid; /* The 2 byte tree id */
251 __u16 Flags; /* optional support bits */
252 enum statusEnum tidStatus;
253 #ifdef CONFIG_CIFS_STATS
254 atomic_t num_smbs_sent;
257 atomic_t num_flushes;
258 atomic_t num_oplock_brks;
261 atomic_t num_deletes;
263 atomic_t num_posixopens;
264 atomic_t num_posixmkdirs;
266 atomic_t num_renames;
267 atomic_t num_t2renames;
271 atomic_t num_hardlinks;
272 atomic_t num_symlinks;
274 atomic_t num_acl_get;
275 atomic_t num_acl_set;
276 #ifdef CONFIG_CIFS_STATS2
277 unsigned long long time_writes;
278 unsigned long long time_reads;
279 unsigned long long time_opens;
280 unsigned long long time_deletes;
281 unsigned long long time_closes;
282 unsigned long long time_mkdirs;
283 unsigned long long time_rmdirs;
284 unsigned long long time_renames;
285 unsigned long long time_t2renames;
286 unsigned long long time_ffirst;
287 unsigned long long time_fnext;
288 unsigned long long time_fclose;
289 #endif /* CONFIG_CIFS_STATS2 */
292 spinlock_t stat_lock;
293 #endif /* CONFIG_CIFS_STATS */
294 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
295 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
296 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
297 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
300 bool seal:1; /* transport encryption for this mounted share */
301 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
302 for this mount even if server would support */
303 bool local_lease:1; /* check leases (only) on local system not remote */
304 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
305 bool need_reconnect:1; /* connection reset, tid now invalid */
306 #ifdef CONFIG_CIFS_FSCACHE
307 u64 resource_id; /* server resource id */
308 struct fscache_cookie *fscache; /* cookie for share */
310 /* BB add field for back pointer to sb struct(s)? */
314 * This is a refcounted and timestamped container for a tcon pointer. The
315 * container holds a tcon reference. It is considered safe to free one of
316 * these when the tl_count goes to 0. The tl_time is the time of the last
317 * "get" on the container.
320 unsigned long tl_index;
321 unsigned long tl_flags;
322 #define TCON_LINK_MASTER 0
323 #define TCON_LINK_PENDING 1
324 #define TCON_LINK_IN_TREE 2
325 unsigned long tl_time;
327 struct cifsTconInfo *tl_tcon;
330 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
332 static inline struct cifsTconInfo *
333 tlink_tcon(struct tcon_link *tlink)
335 return tlink->tl_tcon;
338 extern void cifs_put_tlink(struct tcon_link *tlink);
340 static inline struct tcon_link *
341 cifs_get_tlink(struct tcon_link *tlink)
343 if (tlink && !IS_ERR(tlink))
344 atomic_inc(&tlink->tl_count);
348 /* This function is always expected to succeed */
349 extern struct cifsTconInfo *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
352 * This info hangs off the cifsFileInfo structure, pointed to by llist.
353 * This is used to track byte stream locks on the file
355 struct cifsLockInfo {
356 struct list_head llist; /* pointer to next cifsLockInfo */
363 * One of these for each open instance of a file
365 struct cifs_search_info {
366 loff_t index_of_last_entry;
367 __u16 entries_in_buffer;
370 char *ntwrk_buf_start;
371 char *srch_entries_start;
374 unsigned int resume_name_len;
378 bool smallBuf:1; /* so we know which buf_release function to call */
381 struct cifsFileInfo {
382 struct list_head tlist; /* pointer to next fid owned by tcon */
383 struct list_head flist; /* next fid (file instance) for this inode */
384 unsigned int uid; /* allows finding which FileInfo structure */
385 __u32 pid; /* process id who opened file */
386 __u16 netfid; /* file id from remote */
387 /* BB add lock scope info here if needed */ ;
388 /* lock scope id (0 if none) */
389 struct file *pfile; /* needed for writepage */
390 struct dentry *dentry;
391 struct vfsmount *mnt;
392 struct tcon_link *tlink;
393 struct mutex lock_mutex;
394 struct list_head llist; /* list of byte range locks we have. */
395 bool closePend:1; /* file is marked to close */
396 bool invalidHandle:1; /* file closed via session abend */
397 bool oplock_break_cancelled:1;
398 atomic_t count; /* reference count */
399 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
400 struct cifs_search_info srch_inf;
401 struct work_struct oplock_break; /* work for oplock breaks */
404 /* Take a reference on the file private data */
405 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
407 atomic_inc(&cifs_file->count);
410 /* Release a reference on the file private data */
411 static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
413 if (atomic_dec_and_test(&cifs_file->count)) {
414 cifs_put_tlink(cifs_file->tlink);
415 dput(cifs_file->dentry);
421 * One of these for each file inode
424 struct cifsInodeInfo {
425 struct list_head lockList;
426 /* BB add in lists for dirty pages i.e. write caching info for oplock */
427 struct list_head openFileList;
429 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
430 unsigned long time; /* jiffies of last update/check of inode */
431 bool clientCanCacheRead:1; /* read oplock */
432 bool clientCanCacheAll:1; /* read and writebehind oplock */
433 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
434 bool invalid_mapping:1; /* pagecache is invalid */
435 u64 server_eof; /* current file size on server */
436 u64 uniqueid; /* server inode number */
437 #ifdef CONFIG_CIFS_FSCACHE
438 struct fscache_cookie *fscache;
440 struct inode vfs_inode;
443 static inline struct cifsInodeInfo *
444 CIFS_I(struct inode *inode)
446 return container_of(inode, struct cifsInodeInfo, vfs_inode);
449 static inline struct cifs_sb_info *
450 CIFS_SB(struct super_block *sb)
452 return sb->s_fs_info;
455 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
457 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
463 #ifdef CONFIG_CIFS_STATS
464 #define cifs_stats_inc atomic_inc
466 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
470 spin_lock(&tcon->stat_lock);
471 tcon->bytes_written += bytes;
472 spin_unlock(&tcon->stat_lock);
476 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
479 spin_lock(&tcon->stat_lock);
480 tcon->bytes_read += bytes;
481 spin_unlock(&tcon->stat_lock);
485 #define cifs_stats_inc(field) do {} while (0)
486 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
487 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
491 /* one of these for every pending CIFS request to the server */
493 struct list_head qhead; /* mids waiting on reply from this server */
494 __u16 mid; /* multiplex id */
495 __u16 pid; /* process id */
496 __u32 sequence_number; /* for CIFS signing */
497 unsigned long when_alloc; /* when mid was created */
498 #ifdef CONFIG_CIFS_STATS2
499 unsigned long when_sent; /* time when smb send finished */
500 unsigned long when_received; /* when demux complete (taken off wire) */
502 struct task_struct *tsk; /* task waiting for response */
503 struct smb_hdr *resp_buf; /* response buffer */
504 int midState; /* wish this were enum but can not pass to wait_event */
505 __u8 command; /* smb command code */
506 bool largeBuf:1; /* if valid response, is pointer to large buf */
507 bool multiRsp:1; /* multiple trans2 responses for one request */
508 bool multiEnd:1; /* both received */
511 struct oplock_q_entry {
512 struct list_head qhead;
513 struct inode *pinode;
514 struct cifsTconInfo *tcon;
518 /* for pending dnotify requests */
519 struct dir_notify_req {
520 struct list_head lhead;
527 __u32 filter; /* CompletionFilter (for multishot) */
532 struct dfs_info3_param {
533 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
542 * common struct for holding inode info when searching for or updating an
543 * inode with new info
546 #define CIFS_FATTR_DFS_REFERRAL 0x1
547 #define CIFS_FATTR_DELETE_PENDING 0x2
548 #define CIFS_FATTR_NEED_REVAL 0x4
549 #define CIFS_FATTR_INO_COLLISION 0x8
561 unsigned int cf_nlink;
562 unsigned int cf_dtype;
563 struct timespec cf_atime;
564 struct timespec cf_mtime;
565 struct timespec cf_ctime;
568 static inline void free_dfs_info_param(struct dfs_info3_param *param)
571 kfree(param->path_name);
572 kfree(param->node_name);
577 static inline void free_dfs_info_array(struct dfs_info3_param *param,
581 if ((number_of_items == 0) || (param == NULL))
583 for (i = 0; i < number_of_items; i++) {
584 kfree(param[i].path_name);
585 kfree(param[i].node_name);
591 #define MID_REQUEST_ALLOCATED 1
592 #define MID_REQUEST_SUBMITTED 2
593 #define MID_RESPONSE_RECEIVED 4
594 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
595 #define MID_NO_RESP_NEEDED 0x10
597 /* Types of response buffer returned from SendReceive2 */
598 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
599 #define CIFS_SMALL_BUFFER 1
600 #define CIFS_LARGE_BUFFER 2
601 #define CIFS_IOVEC 4 /* array of response buffers */
603 /* Type of Request to SendReceive2 */
604 #define CIFS_STD_OP 0 /* normal request timeout */
605 #define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
606 #define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
607 #define CIFS_BLOCKING_OP 4 /* operation can block */
608 #define CIFS_ASYNC_OP 8 /* do not wait for response */
609 #define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
610 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
611 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
612 #define CIFS_NO_RESP 0x040 /* no response buffer required */
614 /* Security Flags: indicate type of session setup needed */
615 #define CIFSSEC_MAY_SIGN 0x00001
616 #define CIFSSEC_MAY_NTLM 0x00002
617 #define CIFSSEC_MAY_NTLMV2 0x00004
618 #define CIFSSEC_MAY_KRB5 0x00008
619 #ifdef CONFIG_CIFS_WEAK_PW_HASH
620 #define CIFSSEC_MAY_LANMAN 0x00010
621 #define CIFSSEC_MAY_PLNTXT 0x00020
623 #define CIFSSEC_MAY_LANMAN 0
624 #define CIFSSEC_MAY_PLNTXT 0
625 #endif /* weak passwords */
626 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
627 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
629 #define CIFSSEC_MUST_SIGN 0x01001
630 /* note that only one of the following can be set so the
631 result of setting MUST flags more than once will be to
632 require use of the stronger protocol */
633 #define CIFSSEC_MUST_NTLM 0x02002
634 #define CIFSSEC_MUST_NTLMV2 0x04004
635 #define CIFSSEC_MUST_KRB5 0x08008
636 #ifdef CONFIG_CIFS_WEAK_PW_HASH
637 #define CIFSSEC_MUST_LANMAN 0x10010
638 #define CIFSSEC_MUST_PLNTXT 0x20020
639 #ifdef CONFIG_CIFS_UPCALL
640 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
642 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
644 #else /* do not allow weak pw hash */
645 #ifdef CONFIG_CIFS_UPCALL
646 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
648 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
650 #endif /* WEAK_PW_HASH */
651 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
652 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
654 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
655 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
656 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
658 *****************************************************************
659 * All constants go here
660 *****************************************************************
663 #define UID_HASH (16)
666 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
667 * following to be declared.
670 /****************************************************************************
671 * Locking notes. All updates to global variables and lists should be
672 * protected by spinlocks or semaphores.
676 * GlobalMid_Lock protects:
677 * list operations on pending_mid_q and oplockQ
678 * updates to XID counters, multiplex id and SMB sequence numbers
679 * GlobalSMBSesLock protects:
680 * list operations on tcp and SMB session lists and tCon lists
681 * f_owner.lock protects certain per file struct operations
682 * mapping->page_lock protects certain per page operations
686 * sesSem operations on smb session
687 * tconSem operations on tree connection
688 * fh_sem file handle reconnection operations
690 ****************************************************************************/
692 #ifdef DECLARE_GLOBALS_HERE
693 #define GLOBAL_EXTERN
695 #define GLOBAL_EXTERN extern
699 * the list of TCP_Server_Info structures, ie each of the sockets
700 * connecting our client to a distinct server (ip address), is
701 * chained together by cifs_tcp_ses_list. The list of all our SMB
702 * sessions (and from that the tree connections) can be found
703 * by iterating over cifs_tcp_ses_list
705 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
708 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
709 * tcp session, and the list of tcon's per smb session. It also protects
710 * the reference counters for the server, smb session, and tcon. Finally,
711 * changes to the tcon->tidStatus should be done while holding this lock.
713 GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
716 * This lock protects the cifs_file->llist and cifs_file->flist
717 * list operations, and updates to some flags (cifs_file->invalidHandle)
718 * It will be moved to either use the tcon->stat_lock or equivalent later.
719 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
720 * the cifs_tcp_ses_lock must be grabbed first and released last.
722 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
724 /* Outstanding dir notify requests */
725 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
726 /* DirNotify response queue */
727 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
730 * Global transaction id (XID) information
732 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
733 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
734 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
735 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
736 /* on midQ entries */
737 GLOBAL_EXTERN char Local_System_Name[15];
740 * Global counters, updated atomically
742 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
743 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
744 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
745 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
746 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
748 /* Various Debug counters */
749 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
750 #ifdef CONFIG_CIFS_STATS2
751 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
752 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
754 GLOBAL_EXTERN atomic_t smBufAllocCount;
755 GLOBAL_EXTERN atomic_t midCount;
758 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
759 to be established on existing mount if we
760 have the uid/password or Kerberos credential
761 or equivalent for current user */
762 GLOBAL_EXTERN unsigned int oplockEnabled;
763 GLOBAL_EXTERN unsigned int experimEnabled;
764 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
765 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
766 with more secure ntlmssp2 challenge/resp */
767 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
768 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
769 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
770 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
771 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
772 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
774 void cifs_oplock_break(struct work_struct *work);
775 void cifs_oplock_break_get(struct cifsFileInfo *cfile);
776 void cifs_oplock_break_put(struct cifsFileInfo *cfile);
778 extern const struct slow_work_ops cifs_oplock_break_ops;
780 #endif /* _CIFS_GLOB_H */